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Angular Dependency Injection decorators - @Self()/@SkipSelf()/@Host()/@Optional()

Two Injector Hierarchies - Element Injector and Module Injector. Injector Resolution modifiers -
@Self() - Search the Provider only in current component Element Injector
@SkipSelf() - Search the Provider skipping the current component Element Injector
@Host() - Search the Provider only in current component Element Injector or the embedded element (content projected parent)
@Optional() - Provider is optional. Assigns null value to the injected service without breaking the application.

Github url - https://github.com/anuroopjoy/di-deco...
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00:00 - Introduction
00:30 - Injector Hierarchies
06:24 - @Self and @Optional
09:56 - @Host
12:33 - @SkipSelf